Pyrolysis and ignition characteristics of pulverized coals were examined under similar burning conditions to those of industrial burners. In the early stage, fine particles (less than 37 μm) were mainly pyrolyzed by convective heat transfer from surrounding gas. The coals ignited when pyrolyzed volatile matter mixed with surrounding air and formed a combustible mixture. Pyrolysis of large particles was delayed, but accelerated after ignition by radiant heat transfer from coal flames. The effects of radiant heat transfer were strong for intermediate-size particles (37–74 μm). Ignition temperature was examined analytically by using a modified distributed activation energy model for pyrolysis. The calculated results agreed with experimental ones obtained from both laboratory-scale and semi-industrial-scale burners.
Pyrolysis and Ignition Characteristics of Pulverized Coal Particles
Contributed by the Fuels and Combustion Technologies Division and presented at the 2nd International Symposium on Advanced Energy Conversion Systems and Related Technologies, Nagoya, Japan, December 1–3, 1998, of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the FACT Division, March 15, 2000; revised manuscript received October 30, 2000. Associate Editor: C. Saltiel.
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Taniguchi, M., Okazaki , H., Kobayashi , H., Azuhata , S., Miyadera, H., Muto, H., and Tsumura, T. (October 30, 2000). "Pyrolysis and Ignition Characteristics of Pulverized Coal Particles ." ASME. J. Energy Resour. Technol. March 2001; 123(1): 32–38. https://doi.org/10.1115/1.1347989
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